Metal-punching machine



1 vention.

UNITED STATES PATENT OFFICE.

RICHARD A. BRINE, OF REVERE, MASSACHUSETTS.

METAL-PUNCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 576,338, dated February2, 1897. Application filed March 3, 1896. Serial No. 581,701. (Nomodel.)

T0 at whom it may concern:-

Be it known that I, RICHARD A. BRINE,a citizen of the UnitedStates,residing at Revere, in the county of Suffolk and State ofMassachusetts, have invented certain Improvements in Metal-PunchingMachines, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, makingpart of this specification, in which- Figure 1 is a plan of ametal-punching machine constructed in accordance with my in- Fig. 2 is afront elevation of the same, one of the die-holders being removed. Fig.3 is a horizontal section on the line3 3 of Fig. 2. Fig. 4 is a verticalsection through the upper portion of the machine on the line a 4 ofFig. 1. Fig. 5 is a vertical section on the line 5 5 of Fig. 2. Fig. 6is a perspective View of one of the pinich-carrying plungers and itsoperating-lever. Fig. 7 is a view of one of the cylindrical strippers,and Fig. 8 is a view of the holder for supporting the same.

My invention relates to inetal-punchingmachines which are adapted to beoperated by hand, and particularly to a machine of this description inwhich a series of punch-carrying plungers are arranged within a singleframe or casting and are adapted to be operated separately andindependently of each other by means of suitable levers. To simplify andimprove the construction of machines of this character, whereby they maybe operated more conveniently and effectively than heretofore, is theobject of my invention, which consists in certain novel features andcombinations of parts, as hereinafter set forth and specificallyclaimed.

In the said drawings, A represents the frame of the machine, preferablycast in one solid piece, the base a of which is provided on the frontside with recesses I), having slightlyraised seats 10, upon which areplaced a series of cylindrical dies 0, each of which is provided at itsbottom with a flange cZ, above which the die is embraced by a bifurcatedangular holder B, the front vertical portion of which is secured to thebase a by a screw-bolt e, the dies being thus made easily removable,when required, to enable othersof different sizes to be substitutedtherefor. These dies are each centered at the rear by means of twoadjusting-screws f f, passing horizontal] y through the base a into therecess 1) at an angle to each other, as shown in Fig. 3, the die restingagainst these screws, which thus form a gage to determine its positionwith respect to the punch which cooperates therewith. Each die isprovided with a cooperating punch g, removably secured to a verticalplunger .D by means of a set-screw It, said plungers sliding in suitableguides in the upper portion 12 of the frame A, which is provided on itsfront side with recesses 15 in line with the plungers to render theset-screws it accessible when the punches are to be removed or replaced.Each plunger D is provided with an enlarged bifurcated head 20, as shownin Fig. 6, within which is fitted a cam-shaped lever G, pivoted on a pin21 between a pair of cars I; 1', cast integral with the frame A, saidlever being provided at its outer end with a socket 22 for the receptionof a long removable bar or handle k, by which a powerful leverage isobtained as required.

The cars 2' t' and the levers G between the same are arranged diagonallywith respect to the front of 1 and 2, whereby the outer end of thehandle of each lever can be brought down below the level of a largeplate, being punched without interfering therewith, and still be in aconvenient position to be operated by a person standing in front of themachine, which would not be the case if the operating-lever was arrangedat the end of the frame, as in many machines hitherto constructed.

The upper portion 12 of the frame is connected at its ends only with thebase, so that an unobstructedopen space is formed between the base andthe part 12 to receive the work or plate to be punched. This will allowa long plate to be drawn through the frame for the action of any or allof the punches, while the diagonal arrangement of the levers willprevent them from striking such a plate.

The bifurcated head of each plunger D is made in the shape of a hook, asshown at n in Fig. 6, and on each side of the cam-lever is asupplementary cam m, Fig. 6, which when the leveris raised acts upon theoverhanging hook-shaped portion at, thereby lifting the plunger towithdraw the punch from the the machine, as shown in Figs.

metal. The'surface of the plunger-head upon which the cam-lever bearsconsists of a removable hardened-steel plate 19, which takes the wear ofthe cam-lever and is held in place by a lip or flange q, formed integralwith the head, as shown in Figs. 4 and 6.

It will be seen that the lever G may be removed at any time by simplywithdrawing the pin 21 and then pulling the lever out through the openend of the horizontal slot formed by the .hook it. Thisleaves theplunger free to be withdrawn vertically upon removal of its set-screw7b. The construction of the cam-lever to bear directly down upon theupper end of the plunger to project the same obviates all liability ofany springing apart of the parts during heavy work, as would be thetendency in case the plunger was provided with a vertically-forked upperend having inwardly-extending lugs entering camgroovcs in the oppositesides of an operatinglever. The separation of the parts is much moreeasily effect-ed in my construction than where the lugs and grooves areemployed, since in the latter construction the frame would have to betaken apart as well as the plunger itself.

Each punch is provided with a hollow cylindrical stripper H, Figs. 2, 5,and '7, having on its front side aslot or opening 0' to enable it toembrace the punch and also afford a passage for the set-screw h, bywhich the punch is secured to its plunger. This stripper, the lowerportion of which is made tapering, isimmovablyheld up securely andfirmly against the under surface of the top portion 12 of the frame A byan angular U-shaped holder I, which is provided with projections 24,fitting into recesses 25 in the stripper, and is secured to the rearside of said frame by a screw-bolt 23, passing through a slot 8, wherebythe holder with its stripper can be readily removed when required. Thestripperis thus always held with its under surface perfectly square orparallel with the surface of the metal being punched and prevents thelatter from being raised or tilted up on one side as the punch is beingwithdrawn, which would be liable to spring the punch out of true, thusnecessitating its removal.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1.. The combination with the frame and the plunger having an overhangingbifurcated hook on its upper end, of the pivoted lever extending throughthe hook bifurcation and provided within the hook with a cam-head, thefull lower cam-surface of which bears on the upper end of the plunger toproject said plunger; the said cam-head being provided at opposite sideswith auxiliary cam-surfaces engaging the under side of the hook atopposite sides of its slot or bifurcation, substantially as set forth.

2. The combination with the frame having parallel diagonally-arrangedears, of the reciprocating plunger having a horizontally-extending,bifurcated, open hook 011 its upper end between said ears, a leverextending down through the hook bifurcation and provided within the hookwith a cam-head, the lower cam edge of which bears upon the upper end ofthe plunger to project it; said camhead having auxiliary cam surfaces orshoulders on its opposite sides and engaging the under side of theoverhanging hook at both sides of its slot, and a transverse pinextending through said ears and cam-head, substantially as set forth.

3. The combination with the cylindrical stripper, of a horizontalU-shaped support embracing said stripper and having an attaching member,and interlocking connections between the arms of said support and thesaid stripper, whereby the stripper may be inserted and removed throughthe open end of its support, substantially as set forth.

4. The combination with the horizontal U- shaped support provided withprojections on the upper sides of its arms and havinga slotted attachingmember at right angles to said arms, of the cylindrical stripper fittingbetween the arms of said U-shaped support and having recesses in itsopposite sides receiving the said projections, substantially as setforth.

5. The combination with the frame, its punch and die, of avertically-adjustable, horizontal U shaped support mounted on the framewith its arms ext-ending at opposite sides of the punch, a tubular orcylindrical stripper embraced by said U shaped support and held firmly,but removably, against the under side of the upper portion of the frameby the upward adjustment of said U-shaped support; the lower edge of thetube or cylinder serving to strip the work from the punch, substantiallyas set forth.

(3. The combination with the frame, its punch and die, of the horizontalU-shaped support straddling the punch and having an upwardly-projectingslotted arm, a set-screw extending through said slot for adjusting thesupport toward and from the under side of the upper portion of theframe, a tubular or cylindrical stripper seated removably upon the saidU-shaped support, with its upper edge clamped thereby to the frame andits lower annular edge next to the die, to engage the work and strip itfrom the punch, substantially as set forth.

7. The combination with the frame, its punch and die, of the U-shapedholder, the removable tubular stripper, seated in and held firmly to theunder side of the upper portion of the frame by said holder and havingits lower end tapered downwardly and inwardly to engage the work asclose to the punch as possible, substantially as set forth.

8. The combination with the frame having a die-recess 1) extendinginwardly from the front side, and a punch thereabove, of j a flanged diein said recess, horizontal adjusting-screws, extending inwardly into thedie recess from the rear side of the frame, and an adjustable horizontalU -shaped holder fitting the frame-recess and embracing thefront side ofthe die above its flange, and clamping it down to the frame,substantially as set forth.

9. The combination with the frame and its die-recess extending inwardlyfrom the front side, and the punch thereabove, of the flanged die in therecess, the horizontal set-screws entering the rear end of the recess,and engaging the rear side of the die above its flange, and the angularholder having a horizontal member fitting the front end of thedie-recess and engaging the die-flange andadepending member restingagainst the front of the frame and secured removably thereto by a screwor bolt, substantially as set forth.

10. The stripper H in the form of a tube having a tapering lower end andprovided with opposite recesses 25 in its outer side, substantially asset forth.

11. The stripper-support comprising a horizontal U-shapcd member I,having lugs 24 on the upper side and between the ends of its two armsand an upwardly-projecting longitudinally-slotted attaching-arm at itsclosed end, substantially as set forth.

12. The combination with the frame comprising a base portion having aseries of dies 011 its upper side, and a top portion connected at itsends only with the ends of the base and having a series of pairs ofdiagonally-arranged ears on its upper side, of a series of punchplungersmounted in the top portion of the frame over the dies, and a series ofcam-1evers pivoted between the said ears and operatively connected withthe upper ends of the plungers to throw them positively in bothdirections, substantially as set forth.

Witness my hand this 29th day of February, A. D. 1896.

RICHARD A. BRINE.

In presence of- P. E. TESOHEMAOHER, B. L. MARDEN.

